|
|
| 1. | movement of compacted grains with velocity of particles at the walls slightly lower than in the rod like |
| 粘附滑移流动是一种密集颗粒的急跳式的运动，在壁面处，颗粒的速度稍低于呈杆状的中心的速度。 |
|
|
| | |
| 2. | Like the core of earth, the mantle can also be divided into two concentric layers, the lower mantle and |
| 就像地球的核部一样。地幔也可分为两个同心圆圈层，下地幔和上地幔。 |
|
|
| | |